I also am not sure where you're going with this. You're riding a Street Glide with a fairing so how much of a difference do "clean bars" make. Have you seen one set up like this that you're trying to duplicate? What about the brake reservoir, cruise and radio controls, clutch lever? I just don't see how you can ever have totally clean bars, unless we all misunderstood what you meant by this. Also, to directly answer your question, I would definitely not want one control operating both brakes, even with the afore mentioned proportion valve. At very low speeds and turning, using any amount of front brake can drop you so you'd have no way to eliminate this.